Yes, you can absolutely buy a plane ticket with any Capital One credit card, and if you use a travel-specific card like the Venture, Venture X, or VentureOne, you can earn and redeem significant rewards. In 2026, the most effective way to do this is through the Capital One Travel portal, which offers "price drop protection" and allows you to pay for flights using a mix of cash and "miles." For every dollar spent on flights booked through their portal, Venture X holders earn 5x miles. Alternatively, you can buy a ticket directly from an airline's website (like Delta or United) using your card and then use the "Cover Travel Purchases" feature in the Capital One app to "erase" the cost of the ticket using your accumulated miles at a rate of 1 cent per mile. This flexibility is what makes Capital One a favorite among travelers; you aren't locked into a specific airline alliance and can fly on any carrier, including low-cost airlines like Spirit or Ryanair. Furthermore, these cards come with built-in travel protections like Travel Accident Insurance and MasterRental coverage, providing peace of mind that your purchase is protected against certain unforeseen travel disruptions.